名词
中文翻译：环形的
同义词：
['circumferential', 'circumference例句：1. The circle is the most basic shape in mathematics.（圆是数学中最基础的形状。）2. The circumference of a circle is equal to its diameter.（圆的周长等于直径。）']
例句：
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1. The circle is the most basic shape in mathematics.
圆是数学中最基础的形状。
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2. The circumference of a circle is equal to its diameter.
圆的周长等于直径。
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3. The circular motion of the ball is caused by the force of gravity.
球的圆周运动是由重力引起的。